Hotel-door lock.



A. ARI-INS.

HOTEL DOOR LOCK. APPLIOATION FILED JULY 15, 1908. 932,364.- Patented Au24. 1909.

3 SHBBTSSHEET 1.

Q Fl 103 00 A. ARENS.

HOTEL DOOR LOOK. APPLIOATION FILED JULY 15, 1908 3 SHEETS-SHEET 2.

Patented Aug. 24. 1909.

A. ARENS.

HOTEL DOOR LOCK.

APPLICATION FILED JULY 15, 1908.

982,364. l Patented Aug. 24. 1909.

3 SHEETS-SHEET 3.

14 Vi F3; .11. I

w 1 J -1w 1/ QQi bmwmm: Q I'I'QCH-IOZ UNITED STATES PATENT OFFICE.

AUGUST ABENS, OF HARTFORD, CONNECTICUT, ASSIGNOR TO P. 8: F. CORBIN, OFNEW BRITAIN, CONNECTICUT, A CORPORATION OF CONNECTICUT.

HOTEL-DOOR LOCK.

Specification of Letters Patent; I Patented Aug. 24, 1909. Applicationfiled July 15, 19px. Serial No.

To all whom it may concern:

Be it known that 1, AUGUST ARENs, a citizen of the United States,residing at New- Britain, county of Hartford, State of Connecticut, haveinvented certain new 'and useful Improvements. in Hotel-Door Locks, ofwhich the following is a full, clear, and exact description.

I My invention relates to im rovements in look mechanism, and particuarly to a lock for use on hotel doors, and the object thereof istoprovide a mechanism of this character wherein the operation of the lockmay be limited or extended as the exigencies of-use may require. Forexample, it is often desirable that access to a room be limitedexclusively tothe tenant thereof in the case where a room is usedfor-the display of vention, any one of ve keys may be used,

towit, the pass key or guest key, ordinarily bitted so as to fit onlyone look; second, a master key or servants key, bitted to fit severalvlocks, for example, all of the locks on one floor; third, a grand-masterkey for the housekeeper, by which she, can lock or ,unlock any of thelocks on the several floors fourth, a display key, by which access tothe room may be limited to the tenant, or occupant, 'and also theproprietor; fifth, an emergency key, which is held by the proprietor,and which is capable of operating the lock when lockedby any of theother keys, in-

cludin the display key.

Thedock mechanism is so arranged that it may beoperated interchangeablyby looking and unlocking by any one of the first three keys mentioned,namely, the guest key, master key and grand-master key. When locked bythe displa or emer ency key, however, the lock may e release only by thedisplay or emergency keys, the same keys thus confiningaccess to a roomoccupied for display purposes, to the occupant, and to the proprietor incase of emergency.

. The invention further provides that when" the locking mechanismremoved emergency and display keys.

the mechanism is locked from the inside, it

may be released from the outside only the emergency key. I

A further o ject of the invention is to pro videmeans whereby the knobof the door will be held against rotation when the'door is locked fromthe inside, in order to indicate to one attempting to enter the roomthat the room is already occupied.

With these and other objects in view, the invention consists in theconstructionand arrangement of parts illustrated in the accompanyingdrawings,- in which Figurel represents the lock mechanism with the capor cover plate removed'from the case. Fig: 2 is an end view of the lock,looking toward the front plate. Fig. 3 is a view similar to Fig. 1, withcertain parts of for clearer illustration. Fig. 4 is a fragmentary viewof'the upper or main locking bolt, showing the position of the tumblerswhen the bolt is extended by certain keys. Fig. 5 is.a view similar toFig. 4, showing theepositio'n of the tumblers when operated by. certainother keys. Fig. 6 is a view with the lock case in section, disclosingthe rear ends of the tumblers and certain Fig. 7 is a view of removedfrom the lock. Figs. 8, '9 and 10 are views respectively of the wardends of the guest, master and ,grand-master-keys. Figs. 11 and 12 aresimilar views of the connecting mechanism.

In the embodiment of my invention herein selected for illustration, thelock comprises a case 1 for containing the lock mechanism proper, whichisprovided with the usual front plate 2 and a cap or cover plate 2 (Fig.

6) which, when the lock is secured in position within the door, islocated tdward the outside. W'ithin the-case a main locking bolt 3 isslidably mounted in suitable guides, upon which bolt the severaltumblers are pivoted on a stud 4, which tumblers are adapted to be heldin looking or unlocking position'by means of springs 5 in. the usualmanner, certain of the tumblers being provided with the usual gates 6,which cooperatelwith the racking stump 7 mountedfupon'the bolt 3. Thetumblers for this "bolt may be of any usual construction, with the exceor outside tumbler 8, whip I term the isplay and emergency tumbler, andwhich 1 serves to prevent retraction of the bolt by the emergencytumbler tion of the up er any but the emergency and display keys whenthe bolt has been projected by either of said keys. To this end, theemergency tumbler 8 is provided at the urfder side of its lower edgewit-h a milled ledges (Fig. 7), whereby either the emergency or displaykeys may travel beneath the sweep of the tumbler without changing itsposition. At the same time the remaining tumblers are raised to releasethe racking stump 7 from their gates 6 upon the projection of the bolt,after which the tumblers again drop beh nd the racking stump and hold'itin looking po sition, as illustrated in Fig. 4. v

Referring to Figs. 11 and 12, showing the wards of the emergency anddisplay keys respectively, it will be seen that the w'ardQ of eemergency key is narrow, to permit it to take beneath the sweep of theemergency tumbler and within the milled ledge 8 described.v The ward 10of the dis lav key also is provided with a recess 11, w ich permits thisward to take beneath the swee of the emergency tumbler and within its miled l ledge. By this arrangement the bolt 3 (Fig.

tumbler, furthermore, is provided with'a' tongue 15, having a straightup er edge and a beveled lower edge, the latter icing for the purposehereinafter to be described. When' the emergency umbler is in theposition indicated in Fig. 4, with the bolt 3 extended, the tongue 15liesin range of a milled recess 7 in the end of racking stump 7, andshould attempt now be made to retract the bolt by means of the guest,master or grand-master key, it will be seen that the contact of thewards of these keys against the sweep of said tumbler will serve tothrow'the tongue 15 against the narrowed end of the rackjng stump 7,whereby further movement of the keys to retract the bolt would beprevented,

and hence the retraction of said bolt will'be confined to the emergencyand display keys.

Referring now to Fig. 5, the bolt 3 is here shown ashaving been extendedby means of either the guest, master or grand-master keys, in whichoperation the wards 12, 13 and ,14, respectively, of these keys, havetaken against the sweep of the emergency tumbler nd have so raised thetumbler that the beveo eled forward side 7 of the racking stump 7 in theforward movement of the bolt has engaged the lower beveled face of thetongue 15 of the emergency tumbler, so that said tongue lis above orover said racking stum 65 when the bolt 3 is in extended position. t

outside of the door, the key-hole for this bolt being located in the eaor cover plate, which is u on the outside of t eoase, an apertureX in te case being provided to receive the key stump. I

A second bolt 16 adapted for direct operation only b a key inserted fromthe Inner side of the oor through a key-hole 17 in the case, is alsoprovided, which bolt is operatively connected with the first or mainbolt 3 by means of a lever 18 pivotedat 19 within the case, the ends ofthe lever takin within the recesses-20 and 21 in the first an secondbolts respectively. The recesses in the bolts are so arranged (as shownin Fig. 3) that projection of the upper bolt will serve to retract thelower bolt, 1f the latter has been previously projected, and,conversely, the projection of the lower bolt will serve to retract theupper bolt if the latter has been reviously projected. By this means thecor may be unlocked from either side by the movement of the proper keys,irrespective of which of the bolts is i i-projected or locking position,as will hereinafter appear. The sec- 0nd bolt 16 is provided with atumbler 22, pivoted at the point 23 on said bolt and provided withtheusual operating spring 24 to hold the same in looking or unlocking position with reference to the racking stump 25.

In order that the occupant of the room may not be disturbed, except incase of emergency, when the door is locked from the inside, I providemeans whereby the bolts may not be operated from the outside by any butthe emergency key. To this end, the lower or secondlocking bolt isprovided with an upwardly projecting lug 26, which, when the bolt isprojected, lies in the path of the wards of any key inserted from theoutside. An inspection of the construction of the wards of the keysshown in Figs. 8 to 12 inclusive, will indicate that the wards ofeach ofthese keys (with the exception of the emergency key) are of suchthickness that they en age the bottom plate of the case and lie close yadjacent to the cap plate when in operative osition in the outerkey-hole. It

will be evident, therefore, that if the lug 26 u on the second bolt 16lies in the path of t is key-hole, it will be impossible to insertBuch'keys sufficiently to clear the cap or cover plate, hence operationof the bolts will be prevented. In case, however, it Is deslr- 130ceases" able or necessary to unlock the door from the. outside whenlooked upon the inside, the same may be accomplished by the use of theemergency key, which, as shown in Fig-11,

.has its ward 27 cut away sufficiently to permit the wards to becompletely inserted within thelock case from t 1e outside,notwithstanding the fact that the lug 26 of the second bolt may, lie inline with the outside key-hole; The inner or secondbolt may then beretracted through the intervention of the pivote'd= lever 18, by'iirstrejecting the main orwupper bolt 3, and the attermay then be,

retracted in the usual manner by the same key; To permit theretractionof thelower j .bolt throughthe intervention of'theiever 18, itis-necessarythat means'be rovided to free the racking stump of sai bolt'froni the' gate 'of the -tumbler 22. To this endg-fthe sweep 27 "ofsaid. tumbler. is provided .recess 28, within which the Ward 'ofakey-infscrted in the inner key-hole will rest WhB A the inner b'olt isinprojected position itbein'g understood that. it is 1m olsslble'toreuji'ov'efa key from the inner keyole when the'g inner bolt isprojected. The wardlof 'the' key fin this position also takes against ash0ulder29, upon said bolt 16, so that-immediately'upon. retractivemovement ofsaid lowerboltthe tumbler: 2 2 --thereof willv immediately beraised by rotation of the 'key ward against the sweep of the tumblerwithin the recess.

- 28, whereby the tumbler will be immediately released from the rackingstump '25 and the bolt be free for complete retraction.

In order to permit of the unlocking of th door from the inner side,shouldthe upper or outside bolt be inadvertently projected when the roomis occupied, I provide connecting mechanism'betw'een the tumbler 22 ofthe lower o r-inner bolt-and the tumblers of the bolt, the tumblers ofthe upperwbolt, whereby when said tumbler of the lower bolt is liftedfor retraction of the upper bolt-will be simultaneously freed from t eracking stump 7. i To this end, I provide the connecting plate31 havinga not-ch32, which takes over a projection 33 upon the rear end of thetumble'r 22 of the lower-bolt. The said connecting plate 31 is alsoprovided at its upper end with suitable shoulders 34 and 35, which takeagainst projections 36 and 37 respectively upon the rear ends of thetumblers of the u per bolt.

A, urthcr desirable feature of, the invenlJlOIl'OOItSlStS in the meanswhereby the knob spindlefan'd knob'smay be held against rotation. whenthe door is locked from the inside to indicate that the room isoccupiedj To this end, I provide a rocking lever 38 pivoted on the caseat 39 (Figs. 1 and 3) having a slot 40 in its-upper end adapted toreceive a projection 41 on the lower side of the lower bolt 16.ville-opposite arm of said lever is adapted to engage a shouldered lug42 carried by the roll-baekyoke 43which operates the latch 4 L Said yoke43 isadapted-to be operatedby the roll-back 45 which takes against lugs46 upon the inner end of said yoke, one of whic lugs engages the headedend 47 of the latch bar 48.- From an inspection of Fi s. 1 and 3, itwill becbvious that when the ower bolt is projected, the lower arm oflever 38 will engage behind the lug 42 of the roll-backyoke 43,therebypreventing rotation ofsaid roll-back '45' -and consequently ofthe knob spindle and knobs.

While} have herein described theparti'c'u- I lar construction andarrangementoi parts; whereby theobjects of my inventlo'n may. be.

attained,-it is obvious that the same may be Ivaried indetail withoutdeparting from the;

. ofa boltnonnally 0 table in either direction geney key and displaykey, and a' ihember actuated byfl-allhut the display and emerenckeys'ito prevent the unlocking of said byahjbfga serieeo keys, includingan emerolt y any other of said. keys when locked by either the emergencyor display key, a second bolt operableffrdm the inside, and means toprevent unlocking of-the door from the out-' side by any but theemergency'key when said second bolt is locked.

3. In a locking mechanism, the'combinas tion of a bolt normally 0 erablein either direction from the outside y any of a series of keys,including an emergency and a display key, a second bolt operable ineither direction from the inside by any of said. keys, connecting meansbetween said bolts whereby either bolt may be retracted by theprojection of the other, and a member actuated byallbut the display andemergency keys to prevent unlocking of said first boltby anyother ofsaid keys when locked by either the emergency or display key, and meansfor reventing retractionof said second bolt rorn the outside by any butthe emergency key. I

4. In a locking mechanism, the combination of a bolt operable in eitherdirection from the outside by any of a series of keys, including anemergency and a display key, a

second bolt operablein either direction from the inside by any of saldkeys, connecting means between said bolts whereby either bolt,may beretracted by the pro'ection of the other, a member actuated by a l butthe display and emergency keys to prevent op.- eration of said firstbolt by any .but said emergency or display key when projected by eitherof said keys, and a lug on said second bolt adapted to prevent theoperative insertion of any but the emergency key from the outside whenthe second bolt is projected whereby operation of the first olt andthrough it retraction of the second bolt from rection by any of sai theoutside is limited to said emergency key.

5. In a locking mechanism, the combination ofa bolt normally operable ineither dimotion from the outside i display key, and means to limit theoperation of the first bolt to the emergency key when the second bolt isprojected.

6. In a locking mechanism, the combination of a bolt operable in eitherdirection from the outside by any of a series of keys, including anemergency and a display key, a second bolt operable in either'directionfrom the inside by any of said keys, connecting means between said boltswhereby either bolt may be retracted by the projection of the other amemberactuated by all but the display and emergenc keys to prevent unlocing of said first bo t by any other of said keys when locked by eitherthe display or the emergency key, and means to prevent the operativeinsertion of any but theemergency key from the outside when the secondbolt is projected whereby operation of the first bolt and through itretraction ofthe second bolt {(romthe outside is limited to saidemergency 7. In a lock mechanism, the combination of a bolt adapted tobe actuated by any of a series of keys, including a display key and anemergency key, of a tumbler adapted, when the bolt is thrown to itslocked position by the display key, to prevent the operation of anyother key but the display and emergency keys.

8. In a lock mechanism, the combination of a bolt, tumbler mechanismadapted to be actuated by any one of a series of keys, includingadisplay key and an emergency key, and a'mcmher operable, when thetumbler mechanism and bolt have been actuated by the display key, toprevent the operation of the tumbler mechanism and bolt by any other butthe display and emergency keys.

9. In a lock mechanism, the combination of a bolt, a main tumblermechanism adapted to be a'ctuatedby any one of a series of keys,including a display key and an emergency key, a tumbler operable whenthe maintumbler mechanism and bolt have been actuated by the display keyor emergency key to prevent the retraction of the bolt by any but thedis lay and emergency keys.

10. n a lock mechanism, the combination of a bolt and aseries of maintumblers adaptedto be actuated by a plurality of keys, including adisplay key and an emergency key, of a tumbler actuated by all of thekeys except the dis lay key and emergency key, and a apted, Wien thebolt is thrown to the locked position by the display key or emergencykey, to prevent the unlocking of the bolt by any other'but the displayand emergency keys.

11. In a lock mechanism, the combination of a bolt normally operable ineither direction by any of a series of keys including an emergency keyand a dis lay key, a racking stump on said bolt, tum ler mechanismcooperating with said stump and including a tumbler having means adaptedto be positioned in certain relation to said racking stump by saidemergency and display keys to prevent unlocking of the bolt by any otherof said ke'ys.

12. In a lock mechanism, the combination of a bolt normally operable ineither direction by any of a series of keys including an emergency and adisplay key, a racking stump on said bolt, tumbler mechanism cooperatingwith saidstump and including a tumbler having a tongue adapted to bepositioned below said stump when operated by said emergency or displaykeys to prevent unlocking of said bolt by the others of said keys.

13. In a locking mechanism, the combination of a bolt normally operablein eitherdirection by any of a series of keys including an emergency anda display key, a racking stump, tumbler mechanism cooperating therewith,including a tumbler adapted to be so posi tioned by said cmcrgen cy ordisplay keys that the bolt may be unlocked only by the emergency ordisplay keys.

14. In a locking mechanism, the combination of a bolt opcrablcin eitherdirection from the outside, a second bolt operable in either directionfrom the inside, connecting means between said bolts whereby either ofsaid bolts may be retracted by the projection of the other, a tumblerfor the second bolt, and means on said tumbler adapted to cooperate withthe ward of a key inserted from the inside to free said tumbler from itsracking stump when said second bolt is retracted through said connectingmeans by operation of the first bolt. v 1

15. In a locking mechanism, the combination of a bolt" operable ineither direction' from the outside, a second bolt operable in eitherdirection from the inside, connecting means between said bolts wherebyeither of said bolts may be retracted by the projection of the other, atumbler for the second bolt and a cam shoulder on said tumbler, and aing said latch, a roll-back for operating sa'i shoulder on saidsecond-bolt adapted-t0 c0- yoke, a shoulder on said yoke, andmeansoperate with the ward of a key inserted from operated by said boltand cooperating with the inside to free said tumbler from itsracksaidshoulder, to revent rotation of the roll- 5 ing stump when saidsecond bolt is retracted back when the b0 t is in looking position.

through said connecting means by operation AUGUST ARENS. of the firstbolt. Witnesses:

16. In a look mechanism, the combination G. ERNEST Roo'r,

of a bolt. a latch, a roll-back yoke for operat- WM. V. COLLINS.

